我正在尝试拍照并将其在我的MainActivity中设置为ImageView。我想将我的相机活动作为一个单独的类,所以我尝试了以下方法:主要活动:
public void onClick(View v) {
switch (v.getId()) {
case R.id.action_button:
Intent camera = new Intent(MainActivity.this,Camera.class);
startActivityForResult(camera ,CAMERA_IDENTIFITER);
break;
default:
break;
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
//super.onActivityResult(requestCode, resultCode, data);
Log.d("onActivityResult","Sucessfully callbacked!"); //This one wont be executed!
switch(requestCode) {
case (CAMERA_IDENTIFITER) : {
if (resultCode == Activity.RESULT_OK) {
Bitmap bitmap = (Bitmap) data.getParcelableExtra(MediaStore.EXTRA_OUTPUT);
mImageView.setImageBitmap(bitmap);
}
break;
}
}
}
这是我的相机活动:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_camera);
takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
pm = getPackageManager();
}
@Override
protected void onStart() {
super.onStart();
if(!isFromActivityResult){
dispatchTakePictureIntent();
}
}
public void dispatchTakePictureIntent() {
if (takePictureIntent.resolveActivity(pm) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
} catch {...}
if (photoFile != null) {
pictureTaken = true;
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
try {
bitmap = ImageFileHandler.handleSamplingAndRotationBitmap(this, Uri.fromFile(new File(mCurrentPhotoPath)));
//mImageView.setImageBitmap(bitmap);
resultIntent = new Intent();
resultIntent.putExtra(MediaStore.EXTRA_OUTPUT,
bitmap);
setResult(Activity.RESULT_OK, resultIntent);
Log.d("onActivityResult","finish() executed!"); //This one gets executed!
finish();
} catch {...}
}
}
相机意图正在正确启动,但是当我拍照时,我没有回到我的主活动中的onActivityResult,我卡在相机意图中。
onStart() 在
执行 onActivityResult() 后被调用。因此,一次又一次地启动相机意图。放置日志并测试自己。解决问题在你的活动中保留一个布尔变量是FronActivityResult。保持默认值为 false 并执行 isFromActivityResult = true;inside onActivityResult().在 onStart 中执行以下操作:
@Override
protected void onStart() {
super.onStart();
if(!isFromActivityResult)
dispatchTakePictureIntent();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
try {
bitmap = ImageFileHandler.handleSamplingAndRotationBitmap(this, Uri.fromFile(new File(mCurrentPhotoPath)));
//mImageView.setImageBitmap(bitmap);
resultIntent = new Intent();
resultIntent.putExtra(MediaStore.EXTRA_OUTPUT,
bitmap);
setResult(Activity.RESULT_OK, resultIntent);
isFromActivityResult = true;// add this line
finish();
} catch {...}
}
}